FIELD: physics.
SUBSTANCE: multifocal lens with the amount of main focal powers n>2 includes the first part of the lens having, at least, one first ring-shaped band and, at least, second part of a lens having, at least, one second ring-shaped zone. Each of zones has, at least, one basic subzone and, at least, one phase subzone. For creation of n main focal powers maximum n-1 parts of the lens is combined which differ, at least, by one optical parameter, and the average focal power of the zone refraction of the first part of the lens is equal to the average refractive power of the zone of the second part of the lens.
EFFECT: improvement of vision both in near and in intermediate range, and, in particular, in a long-distance range.
14 cl, 18 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| TRIFOCAL INTRAOCULAR LENS WITH EXTENDED RANGE OF VISION AND CORRECTION OF LONGITUDINAL CHROMATIC ABERRATION | 2016 |
|
RU2745666C2 |
| MULTIFOCAL OPHTHALMIC LENS WITH CHROMATIC ABERRATION CORRECTION | 2018 |
|
RU2770314C2 |
| LENS | 2019 |
|
RU2788434C2 |
| PSEUDO-ACCOMMODATIVE INTRAOCULAR LENSES WITH MULTIPLE DIFFRACTION STRUCTURES | 2007 |
|
RU2418311C2 |
| PSEUDOACCOMODATIVE INTRAOCULAR LENSES WITH VARIABLE DIFFRACTION REGIONS | 2007 |
|
RU2416812C2 |
| MULTIFOCAL INTRAOCOULAR LENS WITH INCREASED DEPTH OF FIELD | 2015 |
|
RU2673953C2 |
| LENS WITH VARIABLE REFRACTIVE INDEX | 1997 |
|
RU2193225C2 |
| PENTIFOCAL DIFFRACTIVE INTRAOCULAR LENS | 2020 |
|
RU2813167C2 |
| MULTIFOCAL CORRECTION PROVIDING IMPROVED QUALITY OF VISION | 2010 |
|
RU2689287C2 |
| OCULAR MULTIFOCAL DIFFRACTION LENS | 2018 |
|
RU2779523C2 |
